more method parameter fixing

app.py

@@ -245,7 +245,7 @@ def inpaint(input_img, prompt):
     )[:batch_size]
     model_up.del_cache()
 
-    return source_mask_64_img, show_images(up_samples)
+    return show_images(up_samples)
 
 gradio_inputs = [gr.inputs.Image(type='pil',
                                  label="Input Image",